Flower Structure and Flower Structure and FunctionFunction

Flowering plants are called Flowering plants are called ANGIOSPERMS.ANGIOSPERMS.

They are the greatest number of plants on

Earth.What helps them survive?

Diversity !What is diversity?

Diversity is variation

within a community.

Main Plant PartsMain Plant PartsAngiosperms are made up of Angiosperms are made up of 6 parts6 parts::

Stabilizes the plant below ground, absorbs water and nutrients from

the soil.

Stabilizes the plant above ground and allows plant to grow higher

and wider.

Act as food factories of the plant.Take in CO2, make glucose, release

O2. Waxy coat to prevent water

loss--

3 main parts:

1. Roots--

2. Stems--

3. Leaves--

Fibrous root system--

Trees Tap root system--

Cactus, Carrots

Woody stems--Trees, Roses

Herbaceous stems--

Grass, Flowers

Cuticle

Ripened ovary of a flowering plant that contains the seeds. Can be dry or fleshy

Part of flowering plant that contains an

embryo (young plant)and the food (cotyledon)it will need to grow into

a new plant.

Contain angiosperms reproductive parts.

4. Flowers--

5. Seeds--

6. Fruit--

Reproduction in AngiospermsReproduction in AngiospermsFlowers are the reproductive Flowers are the reproductive

structures of angiosperms.structures of angiosperms.

Some have male reproductive partsOthers have female

reproductive partsSome have both--male & female parts

MALE FLOWER PARTS

STAMEN

AntherFilament

POLLEN--

Powder containing male sperm

Hollow structure at bottom of pistil,contains female

egg cell.

FEMALE FLOWER PARTS

Stigma

Style

Ovary

PISTIL

Sticky, pollen

lands here

Flower PartsFlower Parts

PollinationPollinationProcess of getting pollen (sperm) of a plant to the egg—

may be the same plant/may be another plant.

ColorAroma (Smell)

Organisms that carry pollen from stamens to pistils.

Examples: insects, like honeybees, butterflies, moths, birds, and mammals, like bats.

Things that attract pollinators:

Pollinators:

Shape Size

How Does Pollination Occur?How Does Pollination Occur?Flowers provide foodFlowers provide food

Pollen then "sticks" pollinator

Pollinator moves to feed on another flower, pollen grains fall off

animal's body onto pistil of visited flower.

Flowers have different colors, shapes, sizes, and fragrances to

attract different pollinators.

Butterflies--long, slender tongues to pollinate long, narrow flowers.

Bees--open, shallow flowers

NECTAR

Examples:

FertilizationFertilizationPollen travels down—thru the style into the ovary to fertilize Pollen travels down—thru the style into the ovary to fertilize

female egg. female egg.

Fruit protects newly fertilized egg.

Inside the fruit--the seeds that can develop into

new plants.

fertilized egg--

EMBRYOembryo-

-SEED

Ripened Ovary develops into a FRUI

T

Some fruits—1 seed--peachesOthers—Many seeds--apples

Are those fruits or veggies?Are those fruits or veggies?

Foods we call Foods we call vegetables are vegetables are

actually fruits: actually fruits: tomatoes, tomatoes,

cucumbers, cucumbers, squash, squash,

zucchini, and zucchini, and peppers.peppers.

Why???

Seed DispersalSeed Dispersal

How are seeds sent How are seeds sent out or dispersed out or dispersed

into the environment?into the environment?

Animals, water, wind, hooks on certain

seeds (cuckleburr)

How do angiosperms and animals help one

another?Seed lands—conditions right--GERMINATIO

N Sprouting

Quiz Time !!!!!!!!Quiz Time !!!!!!!!

How well did you listen and take How well did you listen and take notes?notes?

Number 1-4 somewhere on your Number 1-4 somewhere on your notes!!notes!!

1. Some leaves and fruit possess 1. Some leaves and fruit possess a waxy coat. What is a waxy coat. What is most most likely likely the purpose of this the purpose of this coating?coating?

A. It traps insectsA. It traps insects

B. It traps sunlightB. It traps sunlight

C. It prevents water lossC. It prevents water loss

D. It looks shinyD. It looks shiny

2. Roots that grow underground 2. Roots that grow underground are important for a plant's are important for a plant's survival. Which statement survival. Which statement bestbest describes their job?describes their job?

A. They absorb water and nutrients.A. They absorb water and nutrients.

B. They produce food.B. They produce food.

C. They contain the seeds for C. They contain the seeds for reproduction.reproduction.

D. They work to scare off underground D. They work to scare off underground predators.predators.

3. Milkweed is a plant that 3. Milkweed is a plant that secretes a milky substance secretes a milky substance

poisonous to insects. What is poisonous to insects. What is the the most likelymost likely advantage of advantage of

this characteristic? this characteristic? 1. Reproduction1. Reproduction

2. Respiration2. Respiration

3. Defense3. Defense

4. Photosynthesis4. Photosynthesis

4. Pollinators, such as birds and 4. Pollinators, such as birds and insects, are very important to insects, are very important to flowering plants. What is the flowering plants. What is the most importantmost important job that job that

they perform?they perform?

1. They bring food to the 1. They bring food to the plant.plant.

2. They scare off predators.2. They scare off predators.

3. They bring water to the 3. They bring water to the plant.plant.

4. They help plants 4. They help plants reproduce.reproduce.